I'm presently working on a M&H 'BB1' from 1922, and have done several others in the past. I was curious about aliquot placement, too. This piano was in completely original condition when it came to me. I observed that all the aliquots were positioned for harmonious intervals with their associated speaking lengths, and remarkably well tuned, too. The treble-most group were tuned to unisons with their speaking lengths; next lower group were at a fifth above speaking lengths; next group at the octave; next group at the twelfth; next group at fifteenth (double octave); next group at 19th, etc. I made notes on how many notes in each group, but I don't have them with me now; in any case, it is clear where these group breaks are since there are corresponding breaks in the hitch-pin array. Hope this is some help. - Tom McNeil - Vermont Piano Restorations
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